//1.暴力循环
class Solution {
public:
    vector<int> twoSum(vector<int>& nums, int target) {
        vector<int> ret ;
    
        for(int i = 0; i < nums.size(); ++i) 
        {
            for(int j = i +1; j < nums.size(); ++j) 
            {
                if(nums[i] + nums[j] == target) 
                {
                    ret = {i,j};
                    goto exit;
                }
            }
        }
        exit:
            return ret;
    }
};



//2.哈希表